Piston ring



May 24, 1938. E. .1. GOODYEAR 2,118,433

PISTON RING Filed Aug. 4,1.956

IiEE-i MIIIIII'I K} Patented May 24, 1938 UNITED STATES PATENT OFFICE 1Claim.

My invention relates to an oil ring for the piston of an internalcombustion engine, and important objects of the invention are toprovidea Ylurable and highly efficient oil ring of the character described,which embodies a pair of complemental ring sections functioningeffectively as an oil seal and to remove excess lubricant from thecylinder wall, which quickly adjusts itself to prevent oil pumpingwithout excessive pressure, which exerts uniform pressure against thecylinder wall, which is simple in its construction and arrangement, andcomparatively economical in its manufacture and use.

With the foregoing and'other objects in view which will appear as thedescription proceeds, the invention consists of the novel construction,combination and arrangement of parts herein specifically described andillustrated in the accompanying drawing, but it is tobe understood thatchanges in the form, proportions and details of construction may beresorted to that come within the scope of the claim hereunto appended.

In the drawing wherein like numerals of reference designatecorresponding parts throughout the several views:

Figure 1 is a fragmentary view, in. longitudinal section, of the enginecylinder, piston, and ring embodying the invention.

Figure 2 is a fragmentary top plan view of the oil ring.

Figure 3 is an enlarged sectional view on line 3-S, Figure 2, and Figure4 is a similar view of the upper ring section.

Referring in detail to the drawing i denotes a piston, which is mountedin the engine cylinder 2 and equipped with the usual compression rings3. The piston is provided with an annular groove t connected with oildrain apertures 5 with the interior of the former. Seated in the grooved is the oil ring 6 embodying the present invention.

The oil ring 6 comprises a lower ring section 7 provided with aplurality of regularly spaced spacing bridges 8, which are formedintegral with the top of said lower ring section.

The oil ring t further comprises an upper ring section 9, which isseated upon the spacing bridges 8, whereby the ring sections 71 and 9are spaced from each other to provide oil drain slots it betweenadjacent spacing bridges.

The outer wall i I of the upper ring section 9 extends at an angle fromthe vertical disposing the upper end thereof inwardly of its lower end.The bottom it of the upper ring section extends at an angle from thehorizontal disposing the larged sectional view in Figure 4.

When assembled in the ring groove 4, the inner wall l3 of the upper ringsection 9 projects inwardly a slight distance beyond the vertical planeof the inner wall M of the lower ring section I,

as shown in the enlarged sectional view in Figure.3.

The tops of the spacing bridges 8 incline outwardly at angles conformingbut opposed to the angularly disposed bottom l2 of the upper ringsection 9 seated thereon, whereby the top and bottom of the assembledoil ring 6 extend and remain parallel relatively to each other at alltimes.

Owing to the angularity of the outer wall ii, of the upper ring section9, initially only the lower corner of said outer wall will engage thecylinder wall. section to properly seat itself quickly by wearequalizing the stock width of the associated ring sections and therebyeliminating the projection of the inner periphery of the upper ringsection, and effecting an efdcient oil seal. The angularity oi thecontacting faces of the upper ring section and of the spacing bridgescauses movement of the ring sections to automatically maintain theproper contacting engagement of the oil ring t with the upper and lowerwalls of the ring groove.

The present invention-provides a most eficient device or its kind forestablishing a positive, nonleak, oil ring, which will cause an engineequipped therewith to function at maximum emciency.

What I claim is:

A piston ring for an internal combustion engine, comprising thecombination of a lower ring section having a plurality of spacingbridges formed integral with the top thereof, the top faces of saidbridges inclining outwardly at an angle to the horizontal, and an upperring section, the bottom of said upper ring section inclining outwardlyat an angle corresponding to the inclination of said bridge top facesand being seated upon the latter, the outer wall of said upper ringsection extending at an angle to the vertical to dispose the lower endof same outwardly of the upper end thereof, the width of the stock ofsaid upper ring section being greater than the width of the stock ofsaid lower ring section disposing the inner wall of said upper ringsection inwardly of the vertical plane of the inner wall of said lowerring section.

i. J. ODYE.

This will cause the upper ring 7

